package jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;

/**
 * 执行DML语句--UPDATE
 */
public class JDBCDemo3 {
    public static void main(String[] args) throws Exception {
//        Class.forName("com.mysql.cj.jdbc.Driver");
//        Connection conn = DriverManager.getConnection(
//                "jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
//                "root",
//                "root");
        Connection conn = DBUtil.getConnection();
        Statement statement = conn.createStatement();
        /*
        UPDATE userinfo
        SET password='666666'
        WHERE username='张三'
         */
        String sql = "UPDATE userinfo " +
                     "SET password='666666' " +
                     "WHERE username='张三'";
        int num = statement.executeUpdate(sql);
        if (num > 0){
            System.out.println("修改成功");
        }else{
            System.out.println("修改失败");
        }
        conn.close();

    }
}
